lkml.org 
[lkml]   [2013]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCHv2, RFC 29/30] thp: call __vma_adjust_trans_huge() for file-backed VMA
    Date
    From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>

    Since we're going to have huge pages in page cache, we need to call
    __vma_adjust_trans_huge() for file-backed VMA, which potentially can
    contain huge pages.

    For now we call it for all VMAs with vm_ops->huge_fault defined.

    Probably later we will need to introduce a flag to indicate that the VMA
    has huge pages.

    Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    ---
    include/linux/huge_mm.h | 6 +++---
    1 file changed, 3 insertions(+), 3 deletions(-)

    diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
    index aa52c48..c6e3aef 100644
    --- a/include/linux/huge_mm.h
    +++ b/include/linux/huge_mm.h
    @@ -161,9 +161,9 @@ static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
    unsigned long end,
    long adjust_next)
    {
    - if (!vma->anon_vma || vma->vm_ops)
    - return;
    - __vma_adjust_trans_huge(vma, start, end, adjust_next);
    + if ((vma->anon_vma && !vma->vm_ops) ||
    + (vma->vm_ops && vma->vm_ops->huge_fault))
    + __vma_adjust_trans_huge(vma, start, end, adjust_next);
    }
    static inline int hpage_nr_pages(struct page *page)
    {
    --
    1.7.10.4


    \
     
     \ /
      Last update: 2013-03-14 22:42    [W:3.814 / U:0.168 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site